the clay ball on a rock.这句语法怎么有点怪怪的,帮忙指出这个cracked open是怎么用的,

the clay ball on a rock.这句语法怎么有点怪怪的,帮忙指出这个cracked open是怎么用的, 英语翻译A potter has a fixed volume of clay in the form of a cylinder laying on its side.As he rolls the clay,the length of the cylinder,L,increases while the radius,r,decreases.If the length of the cylinder is increasing at a constant rate of 0. on-the-ball be on the ball stay on the ball~ If you let go of one big ball and one small ball of clay at the same 什么是bottom/plastic/clay liner egL:use a clay liner isolate the trash from the environment There is a ball on the f什么 At the ball Nathalie had a diamond necklace on. The ball went in the d___ of the man sitting in a boat on the river. The ball went in the d___ of the man sitting in a boat on the river. there is a ball under the desk. these is a cat on the什么意思? I hit the ball on his head. “on the ball的意思是什么 There is a soccer ball and a basketball on the floor.改成一般疑问句 7.We hit the ping-pang ball _____ a paddle.A.in B.on C.with Look.The boy can r____ a bike with a ball on his head. there is (a soccer ball and a basketball) on the floor.括号提问_____ _____ _____ on the floor